Answers

Add 63/70 and 42/40

1^st number: 63/70, 2^nd number: 1 2/40

63/70 + 42/40 is 39/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   63/70 = 63 × 4/70 × 4 = 252/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   42/40 = 42 × 7/40 × 7 = 294/280
4. Add the two like fractions:
   252/280 + 294/280 = 252 + 294/280 = 546/280
5. 546/280 simplified gives 39/20
6. So, 63/70 + 42/40 = 39/20
   In mixed form: 119/20

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